Mode-Content Analysis of a High Power Millimeter-Wave Propagating in a Corrugated Waveguide Using Millimeter-Wave Beam Profile and Position Monitors

• Project/Area Number: 24560066
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied physics, general
• Research Institution: National Institute for Fusion Science
• Principal Investigator: SHIMOZUMA TAKASHI 核融合科学研究所, ヘリカル研究部, 教授 (80270487)
• Co-Investigator(Renkei-kenkyūsha): KUBO Shin 核融合科学研究所, ヘリカル研究部, 教授 (80170025)
• Research Collaborator: OHKUBO Kunizo (00023739)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: ジャイロトロン / コルゲート導波管 / 大電力ミリ波 / モード分析 / マイターベンド / ペルチェ素子 / 核融合 / 伝搬モード分析

Outline of Final Research Achievements

In order to reduce the transmission loss of the micro- and millimeter-wave power in the long-distance transmission line, we developed a real-time profile and position monitor of Mega-Watt millimeter-waves in evacuated corrugated waveguides, and demonstrated a possibility of measuring the power profile of Mega-Watt level millimeter-waves for real-time. The system can be controlled and the profile data also can be acquired remotely. The measured profile data using Mega-Watt and sub-second pulse power from a 154GHz gyrotron well agreed with the burn-pattern obtained using thermal-paper in the short pulse (several milli-seconds) gyrotron operation. Additionally, the power linearity of the analyzed monitor signal was also confirmed in the several power levels. The analyzing method of the included mode contents is also proposed.

Research Products

• [Journal Article] Development of a Millimeter-Wave Beam Position and Profile Monitor for Transmission Efficiency Improvement in an ECRH System (2015)
  • Author(s): T. Shimozuma, S. Kobayashi, S. Ito, Y. Ito, S. Kubo, Y. Yoshimura, M. Nishiura, H. Igami, H. Takahashi, Y. Mizuno, K. Okada, and T. Mutoh
  • Journal Title: EPJ Web of Conferences Volume: 87 Pages: 04011-04011
  • DOI: 10.1051/epjconf/20158704011
  • Open Access / Acknowledgement Compliant
• [Journal Article] R. Makino, S. Kubo, K. Kobayashi, S. Kobayashi, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi and T. Mutoh (2014)
  • Author(s): Power and polarization monitor development for high power millimeter-wavea
  • Journal Title: Review of Scientfic Instruments Volume: 85 Issue: 11
  • DOI: 10.1063/1.4891162
  • Peer Reviewed
• [Journal Article] Extension of high Te regime with upgraded electron cyclotron resonance heating system in the Large Helical Device, Extension of high Te regime with upgraded electron cyclotron resonance heating system in the Large Helical Device (2014)
  • Author(s): H. Takahashi, T. Shimozuma, S. Kubo, Y. Yoshimura, H. Igami, S. Ito, S. Kobayashi, Y. Mizuno, K. Okada, T. Muto, K. Nagaoka, S. Murakami, M. Osakabe, I. Yamada, H. Nakano, M. Yokoyama, T. Ido, A. Shimizu, R. Seki, K. Ida, M. Yoshinuma, T. Kariya, R. Minami, T. Imai
  • Journal Title: Physics of Plasmas Volume: 21 Issue: 6
  • DOI: 10.1063/1.4884365
  • Peer Reviewed
• [Journal Article] Electron cyclotron beam measurement system in the Large Helical Device (2014)
  • Author(s): S. Kamio, H. Takahashi, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, S. Ito, S. Kobayashi, Y. Mizuno, K. Okada, M. Osakabe and T. Mutoh
  • Journal Title: Review of Scientific Instruments Volume: 85
  • Peer Reviewed
• [Journal Article] Spectrum response and analysis of 77-GHz band collective Thomson scattering diagnostic for bulk and fast ions in LHD plasmas (2014)
  • Author(s): M. Nishiura, S. Kubo, K. Tanaka, R. Seki, S. Ogasawara, T. Shimozuma, K. Okada, S. Kobayashi, T. Mutoh, K. Kawahata, T. Watari, LHD experiment group, T. Saito, Y. Tatematsu, S. B. Korsholm, M. Salewski
  • Journal Title: Nuclear Fusion Volume: 54 Issue: 2 Pages: 023006-023006
  • DOI: 10.1088/0029-5515/54/2/023006
  • Peer Reviewed
• [Journal Article] High Harmonic ECH Experiment for Extension of Heating Parameter Regime in LHD (2013)
  • Author(s): T. Shimozuma, H. Takahashi, S. Kubo, Y. Yoshimura, H. Igami, M. Nishiura, S. Ogasawara, R. Makino, H. Idei,
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 2402073-2402073
  • DOI: 10.1585/pfr.8.2402073
  • NAID: 130004685105
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Experiment for Over 200 kW Oscillation of a 295 GHz Pulse Gyrotron (2013)
  • Author(s): Y. Yamaguchi, T. Saito, Y. Tatematsu, S. Ikeuchi, J. Kasa, M. Kotera, I. Ogawa, T. Idehara, S. Kubo, T. Shimozuma, M. Nishiura and K. Tanaka
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 1205165-1205165
  • DOI: 10.1585/pfr.8.1205165
  • NAID: 130003392937
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Optimization of Megawatt 77-GHz Gyrotron Operation for Collective Thomson Scattering in LHD (2013)
  • Author(s): S. Ogasawara, S. Kubo, M. Nishiura, Y. Tatematsu, T. Saito, K. Tanaka, T.
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 2402069-2402069
  • DOI: 10.1585/pfr.8.2402069
  • NAID: 130004685104
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Electron Bernstein wave heating by electron cyclotron wave injection from the high-field side in LHD (2013)
  • Author(s): Y. Yoshimura, H. Igami, S. Kubo, T. Shimozuma, H. Takahashi, M. Nishiura, S. Ohdachi, K. Tanaka, K. Ida, M. Yoshinuma, C. Suzuki, S. Ogasawara, R. Makino, H. Idei, R. Kumazawa, T. Muto, H. Yamada
  • Journal Title: Nuclear Fusion Volume: 53 Issue: 6 Pages: 63004-63004
  • DOI: 10.1088/0029-5515/53/6/063004
  • Peer Reviewed
• [Journal Article] Mode Content Analysis for ECH Transmission Lines by Burn Pattern and Nonlinear Optimization (2012)
  • Author(s): K. Ohkubo, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, S. Kobayashi,
  • Journal Title: Fusion Science and Technology Volume: 62 Pages: 23022-23022
  • Peer Reviewed
• [Journal Article] Suppression of Spurious Mode Oscillation in Mega- watt 77 GHz Gyrotoron as a high quality probe beam source for the Collective Thomson Scattering in LHD (2012)
  • Author(s): Ogasawara, S. Kubo, M. Nishiura, Y. Tatematsu, T. Saito, K. Tanaka, T. Shimozuma, Y.Yoshimura, H. Igami, H. Takahashi, et al.
  • Journal Title: Review of Scientific Instruments Volume: 83 Issue: 10
  • DOI: 10.1063/1.4740257
  • Peer Reviewed
• [Journal Article] Identification of Spurious Modes of High-Power 77-GHz Gyrotron for Collective Thomson Scattering in LHD (2012)
  • Author(s): S. Ogasawara, S. Kubo, M. Nishiura, Y. Tatematsu, T. Saito, K. Tanaka, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, et al.
  • Journal Title: Plasma and Fusion Research Volume: 7 Issue: 0 Pages: 2405061-2405061
  • DOI: 10.1585/pfr.7.2405061
  • NAID: 130003383869
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] ECCD Experiment Using an Upgraded ECH System on LHD (2012)
  • Author(s): Y. Yoshimura, 他
  • Journal Title: Plasma and Fusion Research Volume: 7 Issue: 0 Pages: 2402020-2402020
  • DOI: 10.1585/pfr.7.2402020
  • NAID: 130003366257
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Experimental Results for Electron Bernstein Wave Heating in the Large Helical Device (2012)
  • Author(s): H. Igami, T. Shimozuma, Y. Yoshimura, H. Takahashi, H. Idei, et al.
  • Journal Title: Plasma and Fusion Research Volume: 7 Issue: 0 Pages: 2402110-2402110
  • DOI: 10.1585/pfr.7.2402110
  • NAID: 130003366273
  • ISSN: 1880-6821
  • Peer Reviewed
• [Presentation] High Power Test of a Real-Time High-Resolution Millimeter-Wave Beam Profile Monitor in a Mega-Watt CW ECH Transmission Line (2014)
  • Author(s): T. Shimozuma, S. Kobayashi, S. Ito, Y. Ito, S. Kubo, Y. Yoshimura, H. Igami, H. Takahashi, T. Ii, Y. Mizuno, K. Okada, and T. Mutoh
  • Organizer: Plasma Conference 2014
  • Place of Presentation: Niigata, Japan
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Optimization of High Harmonic ECRH Scenario to Extend a Heating Plasma Parameter Range in LHD (2014)
  • Author(s): T. Shimozuma, H. Igami, S. Kubo, Y. Yoshimura, H. Takahashi, M. Osakabe, T. Mutoh, M. Nishiura, H. Idei, K. Nagasaki, N. Marushchenko and Y. Turkin
  • Organizer: 25th IAEA Fusion Energy Conference
  • Place of Presentation: St. Petersburg, Russia
  • Year and Date: 2014-10-13 – 2014-10-18
• [Presentation] Recent Progress of the ECRH System and Experiment in the Large Helical Device (2014)
  • Author(s): T. Shimozuma, S. Kubo, Y. Yoshimura, H. Igami, H. Takahashi, T. Ii, M. Nishiura, R. Makino, S. Ito, Y. Mizuno, K. Okada, S. Kobayashi, T. Mutoh, R. Minami, T. Kariya and T. Imai
  • Organizer: 2014 US-EU-JPN Workshop on RF Heating Technology
  • Place of Presentation: Sedona,AZ,USA
  • Year and Date: 2014-09-22 – 2014-09-24
• [Presentation] Development of a High Power 300 GHz Band Gyrotron for Collective Thomson Scattering Diagnostics in LHD (2014)
  • Author(s): T. Saito, Yamaguchi, Y. Tatematsu, J. Kasa, M. Kotera, T. Idehara, S. Kubo, T. Shimozuma, K. Tanaka , M. Nishiura
  • Organizer: The 9th Int. Workshop “Strong Microwaves and Terahertz Waves: Sources and Applications
  • Place of Presentation: Nizhny Novgorod, Russia
  • Year and Date: 2014-07-24 – 2014-07-30
• [Presentation] Development of a Millimeter-Wave Beam Position and Profile Monitor for Transmission Efficiency Improvement in an ECRH System (2014)
  • Author(s): T. Shimozuma, S. Kobayashi, S. Ito, Y. Ito, S. Kubo, Y. Yoshimura, M. Nishiura, H. Igami, H. Takahashi, Y. Mizuno, K. Okada, and T. Mutoh
  • Organizer: 18th Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
  • Place of Presentation: Nara, Japan
  • Year and Date: 2014-04-22 – 2014-04-25
• [Presentation] Installation of a 154 GHz Mega-Watt Gyrotron and Its Contribution to the Extension of Plasma Parameter Regime in LHD (2013)
  • Author(s): T. Shimozumaa, H. Takahashia, S. Itoa, S. Kuboa, Y. Yoshimuraa, H. Igamia, M. Nishiuraa, S. Ogasawarab, R. Makinob, Y. Mizunoa, K. Okadaa, S. Kobayashia, T. Mutoha, R. Minamic, T. Kariyac and T. Imai
  • Organizer: The 38th International Conference on Infrared, Millimeter and Terahertz Waves IRMMW-THz 2013
  • Place of Presentation: Mainz, Germany.
• [Presentation] Upgrade of Mega-Watt ECRH System and Its Contribution to Performance Improvement of LHD Plasmas (2013)
  • Author(s): T. Shimozum, H. Takahashi, S. Kubo, Y. Yoshimura, H. Igami, M. Nishiura, S. Ogasawara, R. Makino, S. Ito, Y. Mizuno, K. Okada, S. Kobayashi, T. Mutoh, R. Minami, T. Kariya and T. Imai
  • Organizer: Workshop on RF Heating Technology of Fusion Plasmas 2013
  • Place of Presentation: Speyer, Germany
• [Presentation] Experimental and Ray-Tracing Study of the Third Harmonic Electron Cyclotron Resonance Heating in LHD (2013)
  • Author(s): T. Shimozuma, H. Takahashi, S. Kubo, Y. Yoshimura, H. Igami, M. Nishiuraa, S. Ogasawara, R. Makino, M. Osakabe, K. Nagasaki, N.B. Marushchenko, Y. Turkin and T. Mutoh
  • Organizer: 23nd International Toki Conference
  • Place of Presentation: Toki, Japan
• [Presentation] LHDにおけるECHシステムの高性能化と 大電力アップグレード計画 (2013)
  • Author(s): 下妻 隆, 久保 伸, 吉村 泰夫, 伊神 弘恵, 高橋 裕 己, 西浦 正樹, 小笠原 慎弥, 牧野 良平, 小林 策治, 伊藤 哲, 水野 嘉識, 岡田 宏太, 南 龍太郎, 假家 強, 今井 剛, 武藤 敬
  • Organizer: プラズマ・核融合学会 第30回年会
  • Place of Presentation: 東京工業大学
• [Presentation] High Harmonic ECH Experiment for Extension of Heating Parameter Regime in LHD (2012)
  • Author(s): T. Shimozuma, H. Takahashi, S. Kubo, Y. Yoshimura, H. Igami, M. Nishiura, S. Ogasawaraa, R. Makinoa, H. Ideib, N.B. Marushchenkoc, Y. Turkinc and T. Mutoh
  • Organizer: 22nd International Toki Conference,
  • Place of Presentation: Toki-City, Japan
• [Presentation] LHDにおける電子サイクロトロン高次高調波加熱実験 (2012)
  • Author(s): 下妻 隆、高橋 裕己、久保 伸、吉村 泰夫、伊神 弘恵、西浦 正樹、出射 浩、武藤 敬
  • Organizer: 第9回核融合エネルギー連合講演会
  • Place of Presentation: 神戸国際会議場（兵庫県神戸市）
• [Presentation] LHDにおけるECHシステムのアップグレードとプラズマ加熱領域の拡大 (2012)
  • Author(s): 下妻 隆, 高橋 裕己, 久保 伸, 吉村 泰夫, 伊神 弘恵, 西浦 正樹, 小笠原 慎弥, 牧野 良平, 小林 策治, 伊藤 哲, 水野 嘉識, 岡田 宏太, 南 龍太郎, 假家 強， 今井 剛, 武藤 敬，
  • Organizer: プラズマ核融合学会第29回年会
  • Place of Presentation: クローバープラザ(福岡県春日市）
• [Remarks] 核融合科学研究所ホームページ
  • URL: http://www.nifs.ac.jp/index-j.html